SAT Subject Physics Practice Question 632: Answer and Explanation
13. Which of the following statements best describes the relationship between two objects that are in thermal equilibrium?
A. Their masses are equal.
B. Their volumes are equal.
C. Their density is equal.
D. Their heat content is equal.
E. Their temperatures are equal.
Correct Answer: E
The correct answer is (E). Two different objects that are in thermal equilibrium must be at the same temperature.